Move the composite layer on top of the square mask layer, and press CTRL(CMD) + ALT (OPT) + G (Photoshop and Elements 15+) or CTRL(CMD) + G (Elements), to clip the layer to the mask layer. Notice that the image conforms to the shape of the underlying layer.

Employ the Move Tool to move the composite layer, vertically and horizontally over the mask to find the most visually pleasing position.

5. Add Graphic Image

Apply filter to a photo to create an edgy image that coordinates with the abstract background.